Source Code Cross Referenced for JDBCStoreManager2.java in  » EJB-Server-JBoss-4.2.1 » server » org » jboss » ejb » plugins » cmp » jdbc2 » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server JBoss 4.2.1 » server » org.jboss.ejb.plugins.cmp.jdbc2 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * JBoss, Home of Professional Open Source.
003:         * Copyright 2006, Red Hat Middleware LLC, and individual contributors
004:         * as indicated by the @author tags. See the copyright.txt file in the
005:         * distribution for a full listing of individual contributors.
006:         *
007:         * This is free software; you can redistribute it and/or modify it
008:         * under the terms of the GNU Lesser General Public License as
009:         * published by the Free Software Foundation; either version 2.1 of
010:         * the License, or (at your option) any later version.
011:         *
012:         * This software is distributed in the hope that it will be useful,
013:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015:         * Lesser General Public License for more details.
016:         *
017:         * You should have received a copy of the GNU Lesser General Public
018:         * License along with this software; if not, write to the Free
019:         * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020:         * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
021:         */
022:        package org.jboss.ejb.plugins.cmp.jdbc2;
023:
024:        import org.jboss.ejb.EntityEnterpriseContext;
025:        import org.jboss.ejb.Container;
026:        import org.jboss.ejb.EntityContainer;
027:        import org.jboss.ejb.EjbModule;
028:        import org.jboss.ejb.GenericEntityObjectFactory;
029:        import org.jboss.ejb.plugins.cmp.jdbc.JDBCTypeFactory;
030:        import org.jboss.ejb.plugins.cmp.jdbc.JDBCEntityPersistenceStore;
031:        import org.jboss.ejb.plugins.cmp.jdbc.JDBCStartCommand;
032:        import org.jboss.ejb.plugins.cmp.jdbc.JDBCStopCommand;
033:        import org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCAbstractEntityBridge;
034:        import org.jboss.ejb.plugins.cmp.jdbc.metadata.JDBCEntityMetaData;
035:        import org.jboss.ejb.plugins.cmp.jdbc.metadata.JDBCApplicationMetaData;
036:        import org.jboss.ejb.plugins.cmp.jdbc.metadata.JDBCXmlFileLoader;
037:        import org.jboss.ejb.plugins.cmp.jdbc.metadata.JDBCEntityCommandMetaData;
038:        import org.jboss.ejb.plugins.cmp.ejbql.Catalog;
039:        import org.jboss.ejb.plugins.cmp.jdbc2.bridge.JDBCEntityBridge2;
040:        import org.jboss.ejb.plugins.cmp.jdbc2.schema.Schema;
041:        import org.jboss.ejb.plugins.cmp.jdbc2.schema.EntityTable;
042:        import org.jboss.logging.Logger;
043:        import org.jboss.deployment.DeploymentException;
044:        import org.jboss.metadata.ApplicationMetaData;
045:        import org.jboss.tm.TransactionLocal;
046:
047:        import javax.ejb.DuplicateKeyException;
048:        import javax.ejb.FinderException;
049:        import javax.ejb.EJBException;
050:        import javax.ejb.CreateException;
051:        import javax.ejb.RemoveException;
052:        import java.lang.reflect.Method;
053:        import java.util.Collection;
054:        import java.util.HashMap;
055:        import java.util.ArrayList;
056:        import java.util.List;
057:        import java.util.Map;
058:        import java.util.Iterator;
059:        import java.sql.SQLException;
060:
061:        /**
062:         * @author <a href="mailto:alex@jboss.org">Alexey Loubyansky</a>
063:         * @version <tt>$Revision: 57209 $</tt>
064:         */
065:        public class JDBCStoreManager2 implements  JDBCEntityPersistenceStore {
066:            private static final String CATALOG = "CATALOG";
067:            private static final String SCHEMA = "SCHEMA";
068:            private static final String CREATED_MANAGERS = "CREATED_JDBCStoreManagers";
069:            private static final String CMP_JDBC = "CMP-JDBC";
070:
071:            private EntityContainer container;
072:            private EjbModule ejbModule;
073:            private Logger log;
074:            private JDBCEntityMetaData metaData;
075:            private JDBCEntityBridge2 entityBridge;
076:            private JDBCTypeFactory typeFactory;
077:            private Schema schema;
078:
079:            private InstanceFactory instanceFactory;
080:            private QueryFactory queryFactory;
081:            private CreateCommand createCmd;
082:            private JDBCStartCommand startCmd;
083:            private JDBCStopCommand stop;
084:
085:            private final TransactionLocal cascadeDeleteRegistry = new TransactionLocal() {
086:                protected Object initialValue() {
087:                    return new HashMap();
088:                }
089:            };
090:
091:            // Public
092:
093:            public Schema getSchema() {
094:                schema = (Schema) getApplicationData(SCHEMA);
095:                if (schema == null) {
096:                    schema = new Schema();
097:                    putApplicationData(SCHEMA, schema);
098:                }
099:                return schema;
100:            }
101:
102:            public Catalog getCatalog() {
103:                Catalog catalog = (Catalog) getApplicationData(CATALOG);
104:                if (catalog == null) {
105:                    catalog = new Catalog();
106:                    putApplicationData(CATALOG, catalog);
107:                }
108:                return catalog;
109:            }
110:
111:            public QueryFactory getQueryFactory() {
112:                return queryFactory;
113:            }
114:
115:            public boolean registerCascadeDelete(Object key, Object value) {
116:                Map map = (Map) cascadeDeleteRegistry.get();
117:                return map.put(key, value) == null;
118:            }
119:
120:            public boolean isCascadeDeleted(Object key) {
121:                Map map = (Map) cascadeDeleteRegistry.get();
122:                return map.containsKey(key);
123:            }
124:
125:            public void unregisterCascadeDelete(Object key) {
126:                Map map = (Map) cascadeDeleteRegistry.get();
127:                map.remove(key);
128:            }
129:
130:            // ContainerPlugin implementation
131:
132:            public void setContainer(Container con) {
133:                this .container = (EntityContainer) con;
134:                if (container != null) {
135:                    ejbModule = container.getEjbModule();
136:                    log = Logger.getLogger(this .getClass().getName() + "."
137:                            + container.getBeanMetaData().getEjbName());
138:                } else {
139:                    // undeploy
140:                    ejbModule = null;
141:                }
142:            }
143:
144:            // Service implementation
145:
146:            public void create() throws Exception {
147:                HashMap managersMap = (HashMap) getApplicationData(CREATED_MANAGERS);
148:                if (managersMap == null) {
149:                    managersMap = new HashMap();
150:                    putApplicationData(CREATED_MANAGERS, managersMap);
151:                }
152:                managersMap.put(container.getBeanMetaData().getEjbName(), this );
153:            }
154:
155:            public void start() throws Exception {
156:                initStoreManager();
157:
158:                HashMap managersMap = (HashMap) getApplicationData(CREATED_MANAGERS);
159:                Catalog catalog = getCatalog();
160:                if (catalog.getEntityCount() == managersMap.size()
161:                        && catalog.getEJBNames().equals(managersMap.keySet())) {
162:                    // Make a copy of the managers (for safty)
163:                    List managers = new ArrayList(managersMap.values());
164:
165:                    // Start Phase 2: resolve relationships
166:                    for (int i = 0; i < managers.size(); ++i) {
167:                        JDBCStoreManager2 manager = (JDBCStoreManager2) managers
168:                                .get(i);
169:                        manager.resolveRelationships();
170:                    }
171:
172:                    // Start Phase 3: init cmr loaders
173:                    for (int i = 0; i < managers.size(); ++i) {
174:                        JDBCStoreManager2 manager = (JDBCStoreManager2) managers
175:                                .get(i);
176:                        manager.startEntity();
177:                    }
178:
179:                    // Start Phase 4: create tables and compile queries
180:                    for (int i = 0; i < managers.size(); ++i) {
181:                        JDBCStoreManager2 manager = (JDBCStoreManager2) managers
182:                                .get(i);
183:                        manager.startStoreManager();
184:                    }
185:
186:                    // add foreign key constraints
187:                    for (int i = 0; i < managers.size(); ++i) {
188:                        JDBCStoreManager2 manager = (JDBCStoreManager2) managers
189:                                .get(i);
190:                        manager.startCmd.addForeignKeyConstraints();
191:                    }
192:                }
193:            }
194:
195:            public void stop() {
196:                if (stop != null) {
197:                    Map managersMap = (HashMap) getApplicationData(CREATED_MANAGERS);
198:                    while (!managersMap.isEmpty()) {
199:                        int stoppedInIteration = 0;
200:                        for (Iterator i = managersMap.values().iterator(); i
201:                                .hasNext();) {
202:                            JDBCStoreManager2 manager = (JDBCStoreManager2) i
203:                                    .next();
204:                            if (manager.stop.execute()) {
205:                                i.remove();
206:                                try {
207:                                    manager.entityBridge.stop();
208:                                } catch (Exception e) {
209:                                    log.error("Failed to stop entity bridge.",
210:                                            e);
211:                                }
212:                                ++stoppedInIteration;
213:                            }
214:                        }
215:
216:                        if (stoppedInIteration == 0) {
217:                            break;
218:                        }
219:                    }
220:                }
221:            }
222:
223:            public void destroy() {
224:                //To change body of implemented methods use File | Settings | File Templates.
225:            }
226:
227:            // JDBCEntityPersistenceStore implementation
228:
229:            public JDBCAbstractEntityBridge getEntityBridge() {
230:                return entityBridge;
231:            }
232:
233:            public JDBCEntityMetaData getMetaData() {
234:                return metaData;
235:            }
236:
237:            public JDBCTypeFactory getJDBCTypeFactory() {
238:                return typeFactory;
239:            }
240:
241:            public EntityContainer getContainer() {
242:                return container;
243:            }
244:
245:            public Object getApplicationData(Object key) {
246:                return ejbModule.getModuleData(key);
247:            }
248:
249:            public void putApplicationData(Object key, Object value) {
250:                ejbModule.putModuleData(key, value);
251:            }
252:
253:            // EntityPersistenceStore implementation
254:
255:            public Object createBeanClassInstance() throws Exception {
256:                return instanceFactory.newInstance();
257:            }
258:
259:            public void initEntity(EntityEnterpriseContext ctx) {
260:                entityBridge.initPersistenceContext(ctx);
261:                entityBridge.initInstance(ctx);
262:            }
263:
264:            public Object createEntity(Method m, Object[] args,
265:                    EntityEnterpriseContext ctx) throws CreateException {
266:                /*
267:                Object pk;
268:                PersistentContext pctx = (PersistentContext) ctx.getPersistenceContext();
269:                if(ctx.getId() == null)
270:                {
271:                   pk = entityBridge.extractPrimaryKeyFromInstance(ctx);
272:
273:                   if(pk == null)
274:                   {
275:                      throw new CreateException("Primary key for created instance is null.");
276:                   }
277:
278:                   pctx.setPk(pk);
279:                }
280:                else
281:                {
282:                   // insert-after-ejb-post-create
283:                   try
284:                   {
285:                      pctx.flush();
286:                   }
287:                   catch(SQLException e)
288:                   {
289:                      if("23000".equals(e.getSQLState()))
290:                      {
291:                         throw new DuplicateKeyException("Unique key violation or invalid foreign key value: pk=" + ctx.getId());
292:                      }
293:                      else
294:                      {
295:                         throw new CreateException("Failed to create instance: pk=" + ctx.getId() +
296:                            ", state=" + e.getSQLState() +
297:                            ", msg=" + e.getMessage());
298:                      }
299:                   }
300:                   pk = ctx.getId();
301:                }
302:                return pk;
303:                 */
304:                return createCmd.execute(m, args, ctx);
305:            }
306:
307:            public Object postCreateEntity(Method m, Object[] args,
308:                    EntityEnterpriseContext ctx) throws CreateException {
309:                return null;
310:            }
311:
312:            public Object findEntity(Method finderMethod, Object[] args,
313:                    EntityEnterpriseContext instance,
314:                    GenericEntityObjectFactory factory) throws FinderException {
315:                QueryCommand query = queryFactory.getQueryCommand(finderMethod);
316:                return query.fetchOne(schema, factory, args);
317:            }
318:
319:            public Collection findEntities(Method finderMethod, Object[] args,
320:                    EntityEnterpriseContext instance,
321:                    GenericEntityObjectFactory factory) throws FinderException {
322:                QueryCommand query = queryFactory.getQueryCommand(finderMethod);
323:                return query.fetchCollection(schema, factory, args);
324:            }
325:
326:            public void activateEntity(EntityEnterpriseContext ctx) {
327:                entityBridge.initPersistenceContext(ctx);
328:            }
329:
330:            public void loadEntity(EntityEnterpriseContext ctx) {
331:                try {
332:                    EntityTable.Row row = entityBridge.getTable().loadRow(
333:                            ctx.getId());
334:                    PersistentContext pctx = new PersistentContext(
335:                            entityBridge, row);
336:                    ctx.setPersistenceContext(pctx);
337:                } catch (EJBException e) {
338:                    log.error("Failed to load instance of "
339:                            + entityBridge.getEntityName() + " with pk="
340:                            + ctx.getId(), e);
341:                    throw e;
342:                } catch (Exception e) {
343:                    throw new EJBException("Failed to load instance of "
344:                            + entityBridge.getEntityName() + " with pk="
345:                            + ctx.getId(), e);
346:                }
347:            }
348:
349:            public boolean isStoreRequired(EntityEnterpriseContext instance) {
350:                return entityBridge.isStoreRequired(instance);
351:            }
352:
353:            public boolean isModified(EntityEnterpriseContext instance)
354:                    throws Exception {
355:                return entityBridge.isModified(instance);
356:            }
357:
358:            public void storeEntity(EntityEnterpriseContext instance) {
359:                // scary?
360:            }
361:
362:            public void passivateEntity(EntityEnterpriseContext ctx) {
363:                JDBCEntityBridge2.destroyPersistenceContext(ctx);
364:            }
365:
366:            public void removeEntity(EntityEnterpriseContext ctx)
367:                    throws RemoveException {
368:                entityBridge.remove(ctx);
369:                PersistentContext pctx = (PersistentContext) ctx
370:                        .getPersistenceContext();
371:                pctx.remove();
372:            }
373:
374:            // Private
375:
376:            protected void initStoreManager() throws Exception {
377:                if (log.isDebugEnabled()) {
378:                    log.debug("Initializing CMP plugin for "
379:                            + container.getBeanMetaData().getEjbName());
380:                }
381:
382:                metaData = loadJDBCEntityMetaData();
383:
384:                // setup the type factory, which is used to map java types to sql types.
385:                typeFactory = new JDBCTypeFactory(metaData.getTypeMapping(),
386:                        metaData.getJDBCApplication().getValueClasses(),
387:                        metaData.getJDBCApplication().getUserTypeMappings());
388:
389:                entityBridge = new JDBCEntityBridge2(this , metaData);
390:                entityBridge.init();
391:
392:                Catalog catalog = getCatalog();
393:                catalog.addEntity(entityBridge);
394:
395:                stop = new JDBCStopCommand(this );
396:            }
397:
398:            private void resolveRelationships() throws Exception {
399:                entityBridge.resolveRelationships();
400:            }
401:
402:            protected void startStoreManager() throws Exception {
403:                entityBridge.start();
404:
405:                queryFactory = new QueryFactory(entityBridge);
406:                queryFactory.init();
407:
408:                instanceFactory = new InstanceFactory(this , entityBridge);
409:
410:                startCmd = new JDBCStartCommand(this );
411:                startCmd.execute();
412:
413:                final JDBCEntityCommandMetaData entityCommand = getMetaData()
414:                        .getEntityCommand();
415:                if (entityCommand == null
416:                        || "default".equals(entityCommand.getCommandName())) {
417:                    createCmd = new ApplicationPkCreateCommand();
418:                } else {
419:                    final Class cmdClass = entityCommand.getCommandClass();
420:                    if (cmdClass == null) {
421:                        throw new DeploymentException(
422:                                "entity-command class name is not specified for entity "
423:                                        + entityBridge.getEntityName());
424:                    }
425:
426:                    try {
427:                        createCmd = (CreateCommand) cmdClass.newInstance();
428:                    } catch (ClassCastException cce) {
429:                        throw new DeploymentException("Entity command "
430:                                + cmdClass + " does not implement "
431:                                + CreateCommand.class);
432:                    }
433:                }
434:
435:                createCmd.init(this );
436:            }
437:
438:            private void startEntity() throws DeploymentException {
439:                entityBridge.start();
440:            }
441:
442:            private JDBCEntityMetaData loadJDBCEntityMetaData()
443:                    throws DeploymentException {
444:                ApplicationMetaData amd = container.getBeanMetaData()
445:                        .getApplicationMetaData();
446:
447:                // Get JDBC MetaData
448:                JDBCApplicationMetaData jamd = (JDBCApplicationMetaData) amd
449:                        .getPluginData(CMP_JDBC);
450:
451:                if (jamd == null) {
452:                    // we are the first cmp entity to need jbosscmp-jdbc.
453:                    // Load jbosscmp-jdbc.xml for the whole application
454:                    JDBCXmlFileLoader jfl = new JDBCXmlFileLoader(amd,
455:                            container.getClassLoader(), container
456:                                    .getLocalClassLoader(), log);
457:
458:                    jamd = jfl.load();
459:                    amd.addPluginData(CMP_JDBC, jamd);
460:                }
461:
462:                // Get JDBC Bean MetaData
463:                String ejbName = container.getBeanMetaData().getEjbName();
464:                JDBCEntityMetaData metadata = jamd.getBeanByEjbName(ejbName);
465:                if (metadata == null) {
466:                    throw new DeploymentException("No metadata found for bean "
467:                            + ejbName);
468:                }
469:                return metadata;
470:            }
471:        }
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